ISSN : 2287-8327
Physical and Chemical Characterstics of Sediments at Bam Island in Seoul, Korea
김재근 (서울대학교)
- 다운로드 수
- 조회수
Abstract
To examine sediment characteristics and find anthropogenic effects on riverine wetland eco-systems, paleoecological study was carried out at Bamislands in Seoul. Three hundred cm deep sediment coreswere retrieved and dated with the lamination analysis method until 36 cm depth (1986). Sediments were dividedinto three zones based on the depth profiles of physico-chemical variables: below 160 cm depth (before 1968),betwen 160 and 40 cm depths and above 40cm depth (after 1986). Physico-chemical characteristics were veryheavy metal concentrations were relatively low, Cd and As contents have increased continuously. Dry massaccumulation rates during 1968~1986 and 1987~2003 were 140 and 21 kg m-2yr-1, respectively. This wasrelated to flooding intensity and duration. Bulk density,water content, loss on ignition, N, C, C/N ratio were verysimilar to ther river delta but Ca, Na nd K contents were 2 to 4 times higher than others. Heavy metal contentsexcept Pb were lower or similar to those in other studied marshes in Korea. Heavy metal and Mg contents were13C d a t i n gdates of organic materials in sediment, it is uggested that organic matter originated from the watershed andflooding intensity in the watershed might be responsible for the source of sediments. This study providesreference data for the comparison of sediment characteristics at islands in river and for the management of Bamislands.
- keywords
- Flood, History of Bam islands, Nutrient analyses, Pollen density, Sedimentation rateHan, Miehie and Jae Geun Kim J . E c o l . F i e l d B i o l . 2 9 ( 4 ) 390by the lamination analysis method, 2) physical and chemicalcharacteristics of sediments, Flood, History of Bam islands, Nutrient analyses, Pollen density, Sedimentation rateHan, Miehie and Jae Geun Kim J . E c o l . F i e l d B i o l . 2 9 ( 4 ) 390by the lamination analysis method, 2) physical and chemicalcharacteristics of sediments
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